CODEWITHSUNDEEP
pythonmatplotlib
Pernell Louis-Pierre
Pernell Louis-Pierre

Reputation: 7

Plotting using numpy and matplotlib with no display upon plt.show()

So I am trying to get a plot to show and I am able to produce the box for said graph with the x and y axis labeled as necessary, however the line/function in itself is not showing. Is there some sort of issue in my code that I am not noticing? 

import numpy as np
import math
import matplotlib.pyplot as plt

def main():

    X = []
    Y = []
    x = np.arange(-1.5,1.6, 0.101)
    X.append(x)

    for x in X:
        y = x**3 - x
        Y.append(y)

    X = list(X)
    Y = list(Y)

    print(X)
    print(Y)

    plt.xlabel("x")
    plt.ylabel("y")
    plt.plot(X,Y)
    plt.show()

main()

Upvotes: 0

Views: 41

Answers (1)

amiller27
amiller27

Reputation: 506

The problem is that X and Y are lists containing arrays of points, where plot takes arrays of points. If you really need X and Y to be lists containing arrays, then you need to call plot like plt.plot(X[0], Y[0]). Typically, though, you would just have X and Y equal to arrays directly.

Upvotes: 1

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